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  • 1
    Electronic Resource
    Electronic Resource
    Some rotifers from coastal lakes of Brazil, with description of a new rotifer, Lepadella (Xenolepadella) curvicaudata n. sp. (1990)
    Springer
    Hydrobiologia 208 (1990), S. 141-152 
    Details
    ISSN: 1573-5117
    Keywords: rotifers ; Brazil ; coastal lakes ; neotropical ; distribution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Four relatively rare, two common rotifers and one rotifer new to science are described from some coastal lakes near Rio de Janeiro, Brazil. Each rotifer is described in detail, and several are accompanied by illustrations and mensuration data. Geographic distribution and individual habitats of the rotifers are also discussed. Several species show a larger geographic distribution than previously known.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00007780
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Direct-prediction quasi-Newton methods in Hilbert space with applications to control problems (1977)
    Springer
    Journal of optimization theory and applications 21 (1977), S. 199-211 
    Details
    ISSN: 1573-2878
    Keywords: Variable-metric methods ; optimization theorems ; Hilbert spaces ; control theory
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract In this paper, the Hilbert-space analogue of a result of Huang, that all the methods in the Huang class generate the same sequence of points when applied to a quadratic functional with exact linear searches, is established. The convergence of a class of direct prediction methods based on some work of Dixon is then proved, and these methods are then applied to some control problems. Their performance is found to be comparable with methods involving exact linear searches.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00932520
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Direct prediction methods in Hilbert space with applications to control problems (1977)
    Springer
    Journal of optimization theory and applications 22 (1977), S. 399-415 
    Details
    ISSN: 1573-2878
    Keywords: Variable-metric methods ; optimization theorems ; Hilbert spaces ; control theory
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract In this paper, the convergence of variable-metric methods without line searches (direct prediction methods) applied to quadratic functionals on a Hilbert space is established. The methods are then applied to certain control problems with both free endpoints and fixed endpoints. Computational results are reported and compared with earlier results. The methods discussed here are found to compare favorably with earlier methods involving line searches and with other direct prediction quasi-Newton methods.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00932863
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    A new rotifer from a coastal lake in Southeastern Brazil: Hexarthra longicornicula n. sp. (1987)
    Springer
    Hydrobiologia 153 (1987), S. 169-174 
    Details
    ISSN: 1573-5117
    Keywords: rotifers ; taxonomy ; new species ; Neotropis ; Brazil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A new rotifer is described from among samples taken from coastal lakes in southeastern Brazil. Comparisons to related rotifers are made. This new animal belongs to the Hexarthra mira-intermedia species group by way of its general morphological configuration, the number of teeth in the trophi (5), and the two club-shaped caudal appendages (CSCA's). An extremely long dorsal antenna and very long setae extending from the bend in the ventro-lateral arm characterize this animal's speciation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00006648
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    Paper (German National Licenses)
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